68 lines
1.4 KiB
LLVM
68 lines
1.4 KiB
LLVM
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; RUN: opt -deadargelim -S < %s | FileCheck %s
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define void @test(i32) {
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ret void
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}
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define void @foo() {
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call void @test(i32 0)
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ret void
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; CHECK-LABEL: @foo(
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; CHECK: i32 undef
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}
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define void @f(i32 %X) {
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entry:
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tail call void @sideeffect() nounwind
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ret void
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}
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declare void @sideeffect()
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define void @g(i32 %n) {
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entry:
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%add = add nsw i32 %n, 1
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; CHECK: tail call void @f(i32 undef)
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tail call void @f(i32 %add)
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ret void
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}
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define void @h() {
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entry:
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%i = alloca i32, align 4
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store volatile i32 10, i32* %i, align 4
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; CHECK: %tmp = load volatile i32, i32* %i, align 4
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; CHECK-NEXT: call void @f(i32 undef)
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%tmp = load volatile i32, i32* %i, align 4
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call void @f(i32 %tmp)
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ret void
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}
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; Check that callers are not transformed for weak definitions.
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define weak i32 @weak_f(i32 %x) nounwind {
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entry:
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ret i32 0
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}
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define void @weak_f_caller() nounwind {
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entry:
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; CHECK: call i32 @weak_f(i32 10)
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%call = tail call i32 @weak_f(i32 10)
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ret void
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}
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%swift_error = type opaque
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define void @unused_swifterror_arg(%swift_error** swifterror %dead_arg) {
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tail call void @sideeffect() nounwind
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ret void
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}
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; CHECK-LABEL: @dont_replace_by_undef
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; CHECK-NOT: call void @unused_swifterror_arg({{.*}}undef)
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define void @dont_replace_by_undef() {
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%error_ptr_ref = alloca swifterror %swift_error*
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store %swift_error* null, %swift_error** %error_ptr_ref
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call void @unused_swifterror_arg(%swift_error** %error_ptr_ref)
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ret void
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}
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